Finding the Fourth Proportional to 1,789.80, 2,470.89 and 1,081.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.80 : 2,470.89 = 1,081.77 : x
2. Step 2: Convert to fraction form
   1,789.80/2,470.89 = 1,081.77/x
3. Step 3: Cross multiply
   1,789.80x = 2,470.89 × 1,081.77
4. Step 4: Simplify right side
   1,789.80x = 2,672,934.68
5. Step 5: Solve for x
   x = 2,672,934.68/1,789.80
6. Step 6: Final answer
   x = 1,493.43